CN111893372A - As-cast production process of low-temperature impact toughness nodular cast iron - Google Patents
As-cast production process of low-temperature impact toughness nodular cast iron Download PDFInfo
- Publication number
- CN111893372A CN111893372A CN202010796276.0A CN202010796276A CN111893372A CN 111893372 A CN111893372 A CN 111893372A CN 202010796276 A CN202010796276 A CN 202010796276A CN 111893372 A CN111893372 A CN 111893372A
- Authority
- CN
- China
- Prior art keywords
- iron
- mass content
- mass
- smelting
- molten iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
- C21C1/105—Nodularising additive agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to the field related to cast iron production, and particularly discloses an as-cast production process of low-temperature impact toughness nodular cast iron, which comprises the following steps: s1, selecting materials: selecting ductile cast iron foundry returns, pig iron and scrap steel as smelting raw materials, selecting a carburant as an additive, cleaning and derusting the selected raw materials, and drying; s2, smelting: adding nodular cast iron returns, pig iron and scrap steel into a smelting furnace according to the proportion of 4: 5: 1 for preheating, then heating, smelting the nodular cast iron returns, the pig iron and the scrap steel, adding 0.2-0.5% by weight of Cu, continuously heating and smelting to form molten iron, sampling and detecting molten iron components obtained by smelting, and carrying out component adjustment according to sampling and detecting results.
Description
Technical Field
The invention relates to the field related to cast iron production, in particular to an as-cast production process of low-temperature impact toughness nodular cast iron.
Background
The nodular cast iron is spheroidized and inoculated to obtain spheroidal graphite, so that the mechanical properties of the cast iron are effectively improved, and particularly, the plasticity and toughness are improved, so that the strength of the cast iron is higher than that of carbon steel. In the traditional process, a silicon solid solution strengthening ferrite matrix is adopted to achieve the purpose of improving the toughness of the nodular cast iron, but the mechanical properties such as strength reduction, brittleness increase, low-temperature toughness reduction and the like caused by high silicon are reduced.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
an as-cast production process of low-temperature impact toughness nodular cast iron comprises the following steps:
s1, selecting materials: selecting ductile cast iron foundry returns, pig iron and scrap steel as smelting raw materials, selecting a carburant as an additive, cleaning and derusting the selected raw materials, and drying;
s2, smelting: the method comprises the following steps of (1) mixing nodular cast iron returns, pig iron and scrap steel according to a ratio of 4: 5: 1, adding the nodular cast iron returns, pig iron and scrap steel into a smelting furnace for preheating, then heating, smelting, adding 0.2-0.5 wt% of Cu, continuing heating and smelting to obtain molten iron, sampling and detecting molten iron components obtained by smelting, adjusting the components according to sampling detection results to ensure that the mass content of C in the molten iron is 4.1-4.6%, the mass content of Si is 1.3-1.6%, the mass content of Mn is 0.35-0.55%, the mass content of Cu is 0.4-0.6%, the mass content of S is 0.02-0.03% and the mass content of P is 001-0.04%, obtaining qualified molten iron, adding a carburant accounting for 0.3-0.5% of the total mass of the molten iron for initial inoculation, and discharging;
s3, spheroidizing inoculation: the nodulizer accounting for 1.0 to 1.3 percent of the total mass of the molten iron, the inoculant accounting for 0.3 to 0.5 percent of the total mass of the molten iron and the scrap iron accounting for 0.65 to 1 percent of the total mass of the molten iron are baked at the temperature of between 400 and 450 ℃ and are kept warm for 1 hour, then the nodulizer, the inoculant and the scrap iron are packaged, the molten iron accounting for 2/3 percent of the total mass of the molten iron in the step S2 is added, the inoculant is added for secondary inoculation, and the rest molten iron is continuously added;
s4, pouring: pouring the molten iron in the step S3 into a casting ladle, carrying out slagging-off treatment, then carrying out casting, cooling and forming;
s5, heat treatment: cleaning the casting prepared in the step S4, putting the casting into an annealing furnace, heating along with the furnace, adjusting the heating rate within the range of 100-150 ℃/h, heating to 720 ℃, preserving heat for 2-4 hours, then cooling the furnace to 600 ℃, and taking out of the furnace for air cooling.
Preferably, the ductile iron foundry returns in the step S1 have the mass content of C of 3.6-3.8%, Si of 2.5-2.9%, Mn of 0.2-0.5%, P of less than or equal to 0.03% and S of less than or equal to 0.02%.
Preferably, the pig iron in the step S1 has a C content of 4-4.5 wt%, a Si content of 0.4-0.8 wt%, a Mn content of 0.2-0.4 wt%, a P content of 0.04 wt% or less, and a S content of 0.03 wt% or less;
preferably, the scrap in step S1 has a C content of 0.2-0.4% by mass, a Si content of 0.25-0.35% by mass, a Mn content of 0.4-0.6% by mass, a P content of 0.03% by mass or less, and a S content of 0.02% by mass or less.
Preferably, the smelting temperature of the smelting furnace in the step S2 is 1450-.
Preferably, the carburant in step S2 has a C content of 99.5 to 99.8% by mass, a S content of 0.02 to 0.05% by mass, a N content of 0.001 to 0.003% by mass, and a carburant particle size of 1 to 5 mm.
Preferably, the nodulizer in the step S3 is Mg6Re2 nodulizer, wherein the mass content of Mg is 4.5-6%, the mass content of Ca is 1.5-2%, the mass content of Re is 0.6-1.5%, the mass content of Si is 37-48%, the balance is Fe, and the particle size of the nodulizer is 5-12 mm.
Preferably, the inoculant in step S3 is a high silicon calcium barium inoculant containing 70-80% Si by weight and having a inoculant particle size of 1-3 mm.
Preferably, the pouring temperature in the step S4 is 1350-1400 ℃, and the whole pouring completion time is less than or equal to 10 minutes.
Compared with the prior art, the invention has the beneficial effects that: the process combines inoculation and spheroidization, optimizes a heat treatment process, refines crystal grains, improves strength, improves brittleness and improves low-temperature impact toughness.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: an as-cast production process of low-temperature impact toughness nodular cast iron comprises the following steps:
s1, selecting materials: selecting ductile cast iron foundry returns, pig iron and scrap steel as smelting raw materials, selecting a carburant as an additive, cleaning and derusting the selected raw materials, and drying;
s2, smelting: the method comprises the following steps of (1) mixing nodular cast iron returns, pig iron and scrap steel according to a ratio of 4: 5: adding the mixture ratio of 1 into a smelting furnace for preheating, then heating, smelting ductile cast iron return materials, pig iron and scrap steel, adding 0.2-0.5 wt% of Cu, continuously heating and smelting to obtain molten iron, sampling and detecting components of the molten iron obtained by smelting, adjusting the components according to a sampling detection result to ensure that the mass content of C in the molten iron is 4.1%, the mass content of Si is 1.3%, the mass content of Mn is 0.35%, the mass content of Cu is 0.4%, the mass content of S is 0.02% and the mass content of P is 001%, obtaining qualified molten iron, adding a carburant accounting for 0.3% of the total mass of the molten iron for primary inoculation, and discharging;
s3, spheroidizing inoculation: baking a nodulizer accounting for 1 percent of the total mass of the molten iron, an inoculant accounting for 0.3 percent of the total mass of the molten iron and scrap iron accounting for 0.65 percent of the total mass of the molten iron at 400-450 ℃, preserving heat for 1 hour, then bagging the nodulizer, the inoculant and the scrap iron, adding the molten iron accounting for 2/3 percent of the total mass of the molten iron in the step S2, then adding the inoculant for secondary inoculation, and continuously adding the rest molten iron;
s4, pouring: pouring the molten iron in the step S3 into a casting ladle, carrying out slagging-off treatment, then carrying out casting, cooling and forming;
s5, heat treatment: cleaning the casting prepared in the step S4, putting the casting into an annealing furnace, heating along with the furnace, adjusting the heating rate within the range of 100-150 ℃/h, heating to 720 ℃, preserving heat for 2-4 hours, then cooling the furnace to 600 ℃, and taking out of the furnace for air cooling.
Further, in the nodular cast iron foundry returns in the step S1, the mass content of C is 3.6-3.8%, the mass content of Si is 2.5-2.9%, the mass content of Mn is 0.2-0.5%, the mass content of P is less than or equal to 0.03%, and the mass content of S is less than or equal to 0.02%.
Further, in the pig iron in the step S1, the mass content of C is 4-4.5%, the mass content of Si is 0.4-0.8%, the mass content of Mn is 0.2-0.4%, the mass content of P is less than or equal to 0.04%, and the mass content of S is less than or equal to 0.03%;
further, the scrap steel in the step S1 has a C content of 0.2-0.4% by mass, a Si content of 0.25-0.35% by mass, a Mn content of 0.4-0.6% by mass, a P content of not more than 0.03% by mass, and a S content of not more than 0.02% by mass.
Further, the melting temperature of the melting furnace in the step S2 is 1450-.
Further, the carburant in the step S2 contains 99.5-99.8% by mass of C, 0.02-0.05% by mass of S, 0.001-0.003% by mass of N, and 1-5mm in grain size.
Further, the nodulizer in the step S3 is Mg6Re2, wherein the mass content of Mg is 4.5-6%, the mass content of Ca is 1.5-2%, the mass content of Re is 0.6-1.5%, the mass content of Si is 37-48%, the balance is Fe, and the particle size of the nodulizer is 5-12 mm.
Further, the inoculant in the step S3 is a high-silicon calcium barium inoculant containing 70-80% by weight of Si, and the inoculant particle size is 1-3 mm.
Furthermore, in the step S4, the pouring temperature is 1350-1400 ℃, and the whole pouring completion time is less than or equal to 10 minutes.
Example 2: an as-cast production process of low-temperature impact toughness nodular cast iron comprises the following steps:
s1, selecting materials: selecting ductile cast iron foundry returns, pig iron and scrap steel as smelting raw materials, selecting a carburant as an additive, cleaning and derusting the selected raw materials, and drying;
s2, smelting: the method comprises the following steps of (1) mixing nodular cast iron returns, pig iron and scrap steel according to a ratio of 4: 5: adding the mixture ratio of 1 into a smelting furnace for preheating, then heating, smelting ductile cast iron foundry returns, pig iron and scrap steel, adding 0.2-0.5 wt% of Cu, continuously heating and smelting to obtain molten iron, sampling and detecting components of the molten iron obtained by smelting, adjusting the components according to a sampling detection result to ensure that the mass content of C in the molten iron is 4.6%, the mass content of Si is 1.6%, the mass content of Mn is 0.55%, the mass content of Cu is 0.6%, the mass content of S is 0.03% and the mass content of P is 0.04%, obtaining qualified molten iron, adding a carburant accounting for 0.5% of the total mass of the molten iron for primary inoculation, and discharging;
s3, spheroidizing inoculation: baking a nodulizer accounting for 1.2 percent of the total mass of the molten iron, an inoculant accounting for 0.4 percent of the total mass of the molten iron and scrap iron accounting for 0.8 percent of the total mass of the molten iron at 400-450 ℃, preserving heat for 1 hour, then bagging the nodulizer, the inoculant and the scrap iron, adding the molten iron accounting for 2/3 percent of the total mass of the molten iron in the step S2, then adding the inoculant for secondary inoculation, and continuously adding the rest molten iron;
s4, pouring: pouring the molten iron in the step S3 into a casting ladle, carrying out slagging-off treatment, then carrying out casting, cooling and forming;
s5, heat treatment: cleaning the casting prepared in the step S4, putting the casting into an annealing furnace, heating along with the furnace, adjusting the heating rate within the range of 100-150 ℃/h, heating to 720 ℃, preserving heat for 2-4 hours, then cooling the furnace to 600 ℃, and taking out of the furnace for air cooling.
Further, in the nodular cast iron foundry returns in the step S1, the mass content of C is 3.6-3.8%, the mass content of Si is 2.5-2.9%, the mass content of Mn is 0.2-0.5%, the mass content of P is less than or equal to 0.03%, and the mass content of S is less than or equal to 0.02%.
Further, in the pig iron in the step S1, the mass content of C is 4-4.5%, the mass content of Si is 0.4-0.8%, the mass content of Mn is 0.2-0.4%, the mass content of P is less than or equal to 0.04%, and the mass content of S is less than or equal to 0.03%;
further, the scrap steel in the step S1 has a C content of 0.2-0.4% by mass, a Si content of 0.25-0.35% by mass, a Mn content of 0.4-0.6% by mass, a P content of not more than 0.03% by mass, and a S content of not more than 0.02% by mass.
Further, the melting temperature of the melting furnace in the step S2 is 1450-.
Further, the carburant in the step S2 contains 99.5-99.8% by mass of C, 0.02-0.05% by mass of S, 0.001-0.003% by mass of N, and 1-5mm in grain size.
Further, the nodulizer in the step S3 is Mg6Re2, wherein the mass content of Mg is 4.5-6%, the mass content of Ca is 1.5-2%, the mass content of Re is 0.6-1.5%, the mass content of Si is 37-48%, the balance is Fe, and the particle size of the nodulizer is 5-12 mm.
Further, the inoculant in the step S3 is a high-silicon calcium barium inoculant containing 70-80% by weight of Si, and the inoculant particle size is 1-3 mm.
Furthermore, in the step S4, the pouring temperature is 1350-1400 ℃, and the whole pouring completion time is less than or equal to 10 minutes.
Compared with the ductile iron prepared in the embodiment 1, the ductile iron prepared in the embodiment 2 has improved strength, brittleness and low-temperature impact toughness.
Example 3: an as-cast production process of low-temperature impact toughness nodular cast iron comprises the following steps:
s1, selecting materials: selecting ductile cast iron foundry returns, pig iron and scrap steel as smelting raw materials, selecting a carburant as an additive, cleaning and derusting the selected raw materials, and drying;
s2, smelting: the method comprises the following steps of (1) mixing nodular cast iron returns, pig iron and scrap steel according to a ratio of 4: 5: 1, adding the nodular cast iron returns, pig iron and scrap steel into a smelting furnace for preheating, then heating, smelting, adding 0.2-0.5 wt% of Cu, continuing heating and smelting to obtain molten iron, sampling and detecting components of the molten iron obtained by smelting, adjusting the components according to a sampling detection result to ensure that the mass content of C in the molten iron is 4.3%, the mass content of Si is 1.5%, the mass content of Mn is 0.45%, the mass content of Cu is 0.5%, the mass content of S is 0.02% and the mass content of P is 003%, obtaining qualified molten iron, adding a carburant accounting for 0.4% of the total mass of the molten iron for primary inoculation, and discharging;
s3, spheroidizing inoculation: the nodulizing agent accounting for 1.3 percent of the total mass of the molten iron, the inoculant accounting for 0.5 percent of the total mass of the molten iron and the scrap iron accounting for 1 percent of the total mass of the molten iron are roasted at the temperature of 400-450 ℃ and are kept warm for 1 hour, then the nodulizing agent, the inoculant and the scrap iron are packaged, the molten iron accounting for 2/3 percent of the total mass of the molten iron in the step S2 is added, the inoculant is added for secondary inoculation, and the rest molten iron is continuously added;
s4, pouring: pouring the molten iron in the step S3 into a casting ladle, carrying out slagging-off treatment, then carrying out casting, cooling and forming;
s5, heat treatment: cleaning the casting prepared in the step S4, putting the casting into an annealing furnace, heating along with the furnace, adjusting the heating rate within the range of 100-150 ℃/h, heating to 720 ℃, preserving heat for 2-4 hours, then cooling the furnace to 600 ℃, and taking out of the furnace for air cooling.
Further, in the nodular cast iron foundry returns in the step S1, the mass content of C is 3.6-3.8%, the mass content of Si is 2.5-2.9%, the mass content of Mn is 0.2-0.5%, the mass content of P is less than or equal to 0.03%, and the mass content of S is less than or equal to 0.02%.
Further, in the pig iron in the step S1, the mass content of C is 4-4.5%, the mass content of Si is 0.4-0.8%, the mass content of Mn is 0.2-0.4%, the mass content of P is less than or equal to 0.04%, and the mass content of S is less than or equal to 0.03%;
further, the scrap steel in the step S1 has a C content of 0.2-0.4% by mass, a Si content of 0.25-0.35% by mass, a Mn content of 0.4-0.6% by mass, a P content of not more than 0.03% by mass, and a S content of not more than 0.02% by mass.
Further, the melting temperature of the melting furnace in the step S2 is 1450-.
Further, the carburant in the step S2 contains 99.5-99.8% by mass of C, 0.02-0.05% by mass of S, 0.001-0.003% by mass of N, and 1-5mm in grain size.
Further, the nodulizer in the step S3 is Mg6Re2, wherein the mass content of Mg is 4.5-6%, the mass content of Ca is 1.5-2%, the mass content of Re is 0.6-1.5%, the mass content of Si is 37-48%, the balance is Fe, and the particle size of the nodulizer is 5-12 mm.
Further, the inoculant in the step S3 is a high-silicon calcium barium inoculant containing 70-80% by weight of Si, and the inoculant particle size is 1-3 mm.
Furthermore, in the step S4, the pouring temperature is 1350-1400 ℃, and the whole pouring completion time is less than or equal to 10 minutes.
The strength, brittleness and low-temperature impact toughness of the ductile iron prepared in example 3 are all improved compared with those of examples 1 and 2.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An as-cast production process of low-temperature impact toughness nodular cast iron is characterized by comprising the following steps of: the method comprises the following steps:
s1, selecting materials: selecting ductile cast iron foundry returns, pig iron and scrap steel as smelting raw materials, selecting a carburant as an additive, cleaning and derusting the selected raw materials, and drying;
s2, smelting: the method comprises the following steps of (1) mixing nodular cast iron returns, pig iron and scrap steel according to a ratio of 4: 5: 1, adding the nodular cast iron returns, pig iron and scrap steel into a smelting furnace for preheating, then heating, smelting, adding 0.2-0.5 wt% of Cu, continuing heating and smelting to obtain molten iron, sampling and detecting molten iron components obtained by smelting, adjusting the components according to sampling detection results to ensure that the mass content of C in the molten iron is 4.1-4.6%, the mass content of Si is 1.3-1.6%, the mass content of Mn is 0.35-0.55%, the mass content of Cu is 0.4-0.6%, the mass content of S is 0.02-0.03% and the mass content of P is 001-0.04%, obtaining qualified molten iron, adding a carburant accounting for 0.3-0.5% of the total mass of the molten iron for initial inoculation, and discharging;
s3, spheroidizing inoculation: the nodulizer accounting for 1.0 to 1.3 percent of the total mass of the molten iron, the inoculant accounting for 0.3 to 0.5 percent of the total mass of the molten iron and the scrap iron accounting for 0.65 to 1 percent of the total mass of the molten iron are baked at the temperature of between 400 and 450 ℃ and are kept warm for 1 hour, then the nodulizer, the inoculant and the scrap iron are packaged, the molten iron accounting for 2/3 percent of the total mass of the molten iron in the step S2 is added, the inoculant is added for secondary inoculation, and the rest molten iron is continuously added;
s4, pouring: pouring the molten iron in the step S3 into a casting ladle, carrying out slagging-off treatment, then carrying out casting, cooling and forming;
s5, heat treatment: cleaning the casting prepared in the step S4, putting the casting into an annealing furnace, heating along with the furnace, adjusting the heating rate within the range of 100-150 ℃/h, heating to 720 ℃, preserving heat for 2-4 hours, then cooling the furnace to 600 ℃, and taking out of the furnace for air cooling.
2. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: in the nodular cast iron foundry returns in the step S1, the mass content of C is 3.6-3.8%, the mass content of Si is 2.5-2.9%, the mass content of Mn is 0.2-0.5%, the mass content of P is less than or equal to 0.03%, and the mass content of S is less than or equal to 0.02%.
3. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: in the step S1, the pig iron contains 4-4.5% by mass of C, 0.4-0.8% by mass of Si, 0.2-0.4% by mass of Mn, 0.04% or less by mass of P, and 0.03% or less by mass of S.
4. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: in the scrap steel in the step S1, the mass content of C is 0.2-0.4%, the mass content of Si is 0.25-0.35%, the mass content of Mn is 0.4-0.6%, the mass content of P is less than or equal to 0.03%, and the mass content of S is less than or equal to 0.02%.
5. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: the melting temperature of the melting furnace in the step S2 is 1450-1550 ℃.
6. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: in the recarburizing agent in the step S2, the mass content of C is 99.5-99.8%, the mass content of S is 0.02-0.05%, the mass content of N is 0.001-0.003%, and the particle size of the recarburizing agent is 1-5 mm.
7. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: the nodulizer in the step S3 is Mg6Re2, wherein the mass content of Mg is 4.5-6%, the mass content of Ca is 1.5-2%, the mass content of Re is 0.6-1.5%, the mass content of Si is 37-48%, the balance is Fe, and the particle size of the nodulizer is 5-12 mm.
8. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: the inoculant in the step S3 is a high-silicon calcium barium inoculant containing 70-80 wt% of Si, and the inoculant particle size is 1-3 mm.
9. The as-cast production process of low-temperature impact toughness ductile iron according to claim 1, characterized in that: in the step S4, the pouring temperature is 1350-1400 ℃, and the whole pouring completion time is less than or equal to 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796276.0A CN111893372A (en) | 2020-08-10 | 2020-08-10 | As-cast production process of low-temperature impact toughness nodular cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796276.0A CN111893372A (en) | 2020-08-10 | 2020-08-10 | As-cast production process of low-temperature impact toughness nodular cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111893372A true CN111893372A (en) | 2020-11-06 |
Family
ID=73246325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010796276.0A Pending CN111893372A (en) | 2020-08-10 | 2020-08-10 | As-cast production process of low-temperature impact toughness nodular cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111893372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657307A (en) * | 2022-04-18 | 2022-06-24 | 宜宾普什联动科技有限公司 | Production process of minus 50 ℃ low-temperature impact toughness nodular cast iron |
| CN114752739A (en) * | 2022-04-25 | 2022-07-15 | 浙江杭机铸造有限公司 | Machine tool iron casting material and production process thereof |
| CN115652187A (en) * | 2022-11-01 | 2023-01-31 | 四川海工科技有限公司 | Method for producing nodular cast iron |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628323A (en) * | 2009-08-07 | 2010-01-20 | 通州市四安球墨铸铁有限公司 | Casting process of nodular cast iron planet carrier |
| CN102634647A (en) * | 2012-05-11 | 2012-08-15 | 四川城际轨道交通材料有限责任公司 | Low-temperature (minus 60 DEG C) toughness improvement method of nodular cast iron |
| CN105728649A (en) * | 2014-12-10 | 2016-07-06 | 安徽恒升铸业有限公司 | Casting process of iron casting |
| KR20180063675A (en) * | 2016-12-02 | 2018-06-12 | 한국생산기술연구원 | Method for manufacturing Fe-Cu bimetal having good bonding strength |
| CN108588545A (en) * | 2018-03-19 | 2018-09-28 | 河北硕凯铸造有限公司 | A kind of GGG70L spheroidal graphite cast-iron and preparation method thereof |
| CN109576567A (en) * | 2019-02-21 | 2019-04-05 | 河北兴盛机械有限公司 | Heavy axle bevel housing nodular iron casting and its preparation process |
| CN110029267A (en) * | 2018-01-11 | 2019-07-19 | 丰田自动车株式会社 | Spheroidal graphite cast-iron |
| CN110284052A (en) * | 2019-06-25 | 2019-09-27 | 天津昌昊实业有限公司 | A kind of low-temperature ball spheroidal graphite cast iron and its preparation method and application |
| CN111321267A (en) * | 2020-04-29 | 2020-06-23 | 锦州捷通铁路机械股份有限公司 | As-cast production process of minus 40 ℃ low-temperature impact toughness nodular cast iron |
| CN111485164A (en) * | 2020-06-08 | 2020-08-04 | 马鞍山常裕机械设备有限公司 | Casting method for enhancing wear resistance of low-chromium alloy casting |
-
2020
- 2020-08-10 CN CN202010796276.0A patent/CN111893372A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628323A (en) * | 2009-08-07 | 2010-01-20 | 通州市四安球墨铸铁有限公司 | Casting process of nodular cast iron planet carrier |
| CN102634647A (en) * | 2012-05-11 | 2012-08-15 | 四川城际轨道交通材料有限责任公司 | Low-temperature (minus 60 DEG C) toughness improvement method of nodular cast iron |
| CN105728649A (en) * | 2014-12-10 | 2016-07-06 | 安徽恒升铸业有限公司 | Casting process of iron casting |
| KR20180063675A (en) * | 2016-12-02 | 2018-06-12 | 한국생산기술연구원 | Method for manufacturing Fe-Cu bimetal having good bonding strength |
| CN110029267A (en) * | 2018-01-11 | 2019-07-19 | 丰田自动车株式会社 | Spheroidal graphite cast-iron |
| CN108588545A (en) * | 2018-03-19 | 2018-09-28 | 河北硕凯铸造有限公司 | A kind of GGG70L spheroidal graphite cast-iron and preparation method thereof |
| CN109576567A (en) * | 2019-02-21 | 2019-04-05 | 河北兴盛机械有限公司 | Heavy axle bevel housing nodular iron casting and its preparation process |
| CN110284052A (en) * | 2019-06-25 | 2019-09-27 | 天津昌昊实业有限公司 | A kind of low-temperature ball spheroidal graphite cast iron and its preparation method and application |
| CN111321267A (en) * | 2020-04-29 | 2020-06-23 | 锦州捷通铁路机械股份有限公司 | As-cast production process of minus 40 ℃ low-temperature impact toughness nodular cast iron |
| CN111485164A (en) * | 2020-06-08 | 2020-08-04 | 马鞍山常裕机械设备有限公司 | Casting method for enhancing wear resistance of low-chromium alloy casting |
Non-Patent Citations (2)
| Title |
|---|
| 何世松: "《机械制造基础》", 31 August 2009, 哈尔滨工程大学出版社 * |
| 王志: "Cu对球墨铸铁耐磨性能的影响", 《特种铸造及有色合金》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657307A (en) * | 2022-04-18 | 2022-06-24 | 宜宾普什联动科技有限公司 | Production process of minus 50 ℃ low-temperature impact toughness nodular cast iron |
| CN114752739A (en) * | 2022-04-25 | 2022-07-15 | 浙江杭机铸造有限公司 | Machine tool iron casting material and production process thereof |
| CN115652187A (en) * | 2022-11-01 | 2023-01-31 | 四川海工科技有限公司 | Method for producing nodular cast iron |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111893372A (en) | As-cast production process of low-temperature impact toughness nodular cast iron | |
| CN109082584B (en) | Smelting method of as-cast high-toughness high-strength nodular cast iron | |
| CN114032444B (en) | High-strength and high-toughness thick-wall nodular cast iron material and casting method thereof | |
| CN112853025A (en) | Casting process of nodular iron casting for wind power | |
| CN112680650A (en) | High-strength nodular cast iron and preparation method thereof | |
| CN110129661A (en) | The production technology of high-intensitive Low-temperature high-tenacity nodular cast iron | |
| CN111471923A (en) | Thin-wall nodular cast iron and manufacturing method thereof | |
| CN111621689A (en) | Smelting process method for eliminating reverse white cast phenomenon of nodular cast iron | |
| CN103805830A (en) | Preparation method for high strength gray cast iron material | |
| CN112210708B (en) | Nodular cast iron and method for preparing nodular cast iron by using lost foam | |
| CN111270039B (en) | Smelting process for reducing D, E type graphite in surface matrix structure of gray iron piece | |
| CN111910120A (en) | Preparation method of high-toughness nodular cast iron | |
| CN111020357B (en) | Production method for batch production of stable pearlite nodular cast iron QT500-7 | |
| CN110066959B (en) | High-strength low-sulfur high-manganese inoculated gray cast iron material and smelting and pouring process thereof | |
| CN115261711B (en) | Silicon solid solution reinforced ferrite nodular cast iron for wind power casting and preparation method thereof | |
| CN111424207A (en) | Antibacterial and corrosion-resistant cast iron material for pot and manufacturing process of antibacterial and corrosion-resistant cast iron pot | |
| CN110983165A (en) | Inoculant for nodular cast iron and preparation method thereof | |
| CN113737085B (en) | Nodular cast iron axle housing and manufacturing method thereof | |
| CN110438281B (en) | Si-free rare earth magnesium alloy nodulizer and preparation method and application thereof | |
| CN103805831A (en) | Manufacturing method for 195 diesel engine flywheel casting | |
| CN111690866A (en) | Preparation method of high-strength and high-hardness nodular cast iron | |
| CN115074611B (en) | Ferrite matrix gray cast iron and manufacturing method and application thereof | |
| CN110453140B (en) | Low-temperature nodular cast iron material and preparation method and application thereof | |
| CN108950367B (en) | Preparation method of high-performance nodular cast iron | |
| CN110760739A (en) | Preparation method of solid solution strengthened ferritic nodular cast iron for thick and large parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201106 |
|
| WD01 | Invention patent application deemed withdrawn after publication |